Lazo Brnovic developed the foundational structure for the S3J7/Group_12_JavaProject repository, focusing on establishing a reproducible Java project baseline. He implemented core features such as a Test class with a main method and created number utility functions to check even or odd values and identify multiples of 3 and 5 within a specified range. Using Core Java and basic algorithmic logic, Lazo emphasized maintainability and clarity through incremental code refinements. His work enabled faster onboarding and early testability, laying the groundwork for future development. The project’s clean structure and clear commit history support rapid iteration and straightforward feature expansion.